<form class="form-horizontal">
    <div class="row">
        <div class="form-group col-md-6">
            <div class="checkbox">
                <label>
                    <input type="checkbox" ng-model="curWidget.config.option.legendShow" ng-init="curWidget.config.option.legendShow=true"> Show Legend
                </label>
            </div>
        </div>
    </div>
    <div class="row">
        <div class="form-group col-md-4">
            <label class="col-md-4 control-label">x</label>
            <div class="col-md-8">
                <select class="form-control">
                    <option>option 1</option>
                    <option>option 2</option>
                    <option>option 3</option>
                    <option>option 4</option>
                    <option>option 5</option>
                </select>
            </div>
        </div>
        <div class="form-group col-md-4">
            <label class="col-md-4 control-label">y</label>
            <div class="col-md-8">
                <select class="form-control">
                    <option>option 1</option>
                    <option>option 2</option>
                    <option>option 3</option>
                    <option>option 4</option>
                    <option>option 5</option>
                </select>
            </div>
        </div>
    </div>
</form>